Current thresholds are CPU : 5000.0 Free RAM : 0 Free swap : 0 Rating : 0 Based on the CPU threshold and a comment in the code, it's likely it was originally intended to be used for the 1 min load average, which is a function of the number of CPUs. However, this number has been applied for the total CPU load, which never reaches above 1 (100%). Concerning memory thresholds, it's not very useful to warn when they're depleted.